Mineoro DC2008

[Geo]

Hi.
Today a friend gave me a DC2008 to modify it. He wants to replace the sensitivity potentiometer with a multiturn one.
I opened it and i saw that the previous owner had open it and had remove the black resin from the receiver pcb.
Also i saw that there is a problem with the oscillator (2N2646).
So i said that it is time for a reverse engineering until i receive the multiturn potentiometer.
I Must tell that my friend found some small objects (ancient coins etc..) with it at small depth (10... 30 cm).
I attach some photos from it...

Regards

[Geo]

I forgot to say that this LRL has not a microproccesor so it is a good time to make a clone of it.
Schematic seems to be very easy.

[Morgan]

I forgot to say that this LRL has not a microproccesor so it is a good time to make a clone of it.
Schematic seems to be very easy.

Hi Geo


The DC2008 seems to me the MINEORO who can locate some objects,with other models no lucky for me...

Its very strange that this DC2008 not have multiturn pot. ,all DC2008 i saw is using the multiturn,also the one i have ...

Is interesting if you can find in what frequency this MINEORO is working.

[Geo]

Hi Geo


The DC2008 seems to me the MINEORO who can locate some objects,with other models no lucky for me...

Its very strange that this DC2008 not have multiturn pot. ,all DC2008 i saw is using the multiturn,also the one i have ...

Is interesting if you can find in what frequency this MINEORO is working.

Hi Morgan.
Maybe the previous owner to replace the potentiometer, who knows????
This model is with the IR led near to ion champer.
I check it with generator and it is tuned near to 124 Khz. When i will finish it i"ll check exactly for the working frequency.

[Geo]

This LRL is very strange!!!.
I can't understand how it locate coins with a receiver that has only a 3 stages (transistors) amplifier followed by a LM386 as a pro and a 555.
That is all.
Maybe the field at ancient coins is very strong.....
Now understand why when i visited Morgan at Portugal the DC2008 was not able to locate the objects except the gold medal but with the sensitivity at full.
Maybe with a better receiver to have better results

[kostas87]

Hello everybody, hello geo!
I think I understand how he works this device, I have constructed else like brioche but without electronics ..

** It's simple. The light type l e d makes light impinging on a semiconductor. Converted to the semiconductor and conductive filter.
which can be seen the rare energy emitted the buried metal!

We believe we can help someone what I said!

[Morgan]

This LRL is very strange!!!.
I can't understand how it locate coins with a receiver that has only a 3 stages (transistors) amplifier followed by a LM386 as a pro and a 555.
That is all.
Maybe the field at ancient coins is very strong.....
Now understand why when i visited Morgan at Portugal the DC2008 was not able to locate the objects except the gold medal but with the sensitivity at full.
Maybe with a better receiver to have better results

the DC2008 is the mineoro model i use and can pick gold objects,anyway at very short distances and very problematic for the pinpointing.
The buried test gold medal was located in this particular day,however most of the times is not possible to locate.
One other interesting thing,when the DC2008 batteries went to 16 V,the LRL become extremly erratic,anyway in the instructions they said is to change batt. at 12V...

[Geo]

I reversed the pcb and now i have the schematic. I am sure that if i connect at the place of receiver the passive receiver of PD it will have better results. When i will draw the schematic i "ll attach it here for the members.
BTW... your DC2008 at who distance detect the batery spark???

Regards

[Geo]

One other interesting thing,when the DC2008 batteries went to 16 V,the LRL become extremly erratic,anyway in the instructions they said is to change batt. at 12V...

DC2008 use a LM317P as voltage regulator from 18v to 9v. So normally any input voltage from 12v and higher must be ok.

[Sneshko]

Bravo Geo!
I can not wait a full report!
Thanks in advance!
Regards!
Sneshko

[Geo]

Sneshko wait some days...

[Morgan]

I reversed the pcb and now i have the schematic. I am sure that if i connect at the place of receiver the passive receiver of PD it will have better results. When i will draw the schematic i "ll attach it here for the members.
BTW... your DC2008 at who distance detect the batery spark???

Regards

1,5 V Battery spark 60 cm.
I remember the other model DC 2006 its 50 cm
and the PDC 210 is 1,00 m

[Geo]

Same distance with the DC2008 that i have now. On winter i will construct one and i"ll play with other receiver. I am sure that it will give good results at big objects. Now i try to find pot core for the input of the loop. Maybe a magnetic amplifier with ICs to be better.

[Geo]

If the owner allow me, i will connect a switch in series with "ion champer" so to ensure when it detect an object, what is this that locate it, the ion champer or the passive receiver or both. If the champer don't doing anything (as i believe) then it is very easy for everyone to make a clone.

[Morgan]

If the owner allow me, i will connect a switch in series with "ion champer" so to ensure when it detect an object, what is this that locate it, the ion champer or the passive receiver or both. If the champer don't doing anything (as i believe) then it is very easy for everyone to make a clone.

Check this modifications on DC2008 by Esteban :